The sample average of 50 data points is 40. The updated sample average after…
2024
The sample average of 50 data points is 40. The updated sample average after including a new data point taking the value of 142 is ______.
Attempted by 10 students.
Show answer & explanation
Correct answer: 42
Step 1: Compute the original total of the 50 data points.
Original sample size = 50, original average = 40, so original total = 50 × 40 = 2000.
Step 2: Add the new data point 142 to the total.
New total = 2000 + 142 = 2142.
Step 3: Compute the updated average using the new total and new sample size.
New sample size = 51, so updated average = 2142 ÷ 51 = 42.
Answer: 42